Controller Calculating Machine Component

Controller Calculating Machine Component

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This object was collected by Brooklyn high school teacher and historian of mathematics L. Leland Locke and held by the Museums of the Peaceful Arts in New York City before coming to the Smithsonian. The component consists of a frame supporting a shaft with ten gear wheels, a more complex mechanism, and a gear wheel that links to a crank with a black wooden handle. At the top of the more complex mechanism is a cam-shaped piece marked "Add." and "Mult."
Compare to 311948.
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Object Name
calculating machine component
Controller Company
place made
United States: New York, New York City
Physical Description
wood (overall material)
ferrous metal (overall material)
overall: 13.7 cm x 29 cm x 8 cm; 5 13/32 in x 11 13/32 in x 3 5/32 in
ID Number
nonaccession number
catalog number
Credit Line
Gift of L. Leland Locke
See more items in
Medicine and Science: Mathematics
Calculating Machines
Science & Mathematics
Data Source
National Museum of American History
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